[c-nsp] ASR920 vs ME3600 (BDI/vlan/dot1q subints)

[CiscoNSP List]

(Apologies if double post, sent this earlier, but it hasnt shown up)


Hi everyone,

First real look at an ASR920 (Historically we have used ME3600's for this role...cust VRFs etc) - Now, I see the ASR920 is definitely "different" to the ME3600....ie. no "switchport" commands.....more like a router..

So;

On an ME3600, we would have a dot1q trunk coming from an edge L2 switch tagging customer vlans, on the ME3600 port, we would have:

interface GigabitEthernet0/4
 description DOT1QTRUNK_TO_EDGE_SWITCH_FOO
 switchport trunk allowed vlan none
 switchport mode trunk
 load-interval 30
 no cdp enable
 service instance 15 ethernet
  description MANAGEMENT_INT_FOR_TORSW
  encapsulation dot1q 15
  rewrite ingress tag pop 1 symmetric
  bridge-domain 15

Then a vlan int (15) with L3

On the ASR920, we cannot do this....in the same way...

So, we can use BDI ints, or the old dot1q subints...

bdi example...hopefully correct ??

int gi0/0/23
description DOT1QTRUNK_TO_EDGE_SWITCH_FOO
 service instance 15 ethernet
  description MANAGEMENT_INT_FOR_TORSW
  encapsulation dot1q 15
  rewrite ingress tag pop 1 symmetric
  bridge-domain 15

Then a BDI int (15) with L3

Would the above be correct?  And if so, are there any major limitations (QOS for example) that anyone is aware of when using BDI vs the old dot1q subint?  (On our ASR1001's, we initially used BDI Ints, but found netflow did not work "correctly", so swapped back to dot1q subints)

Cheers